| 摘要 |
PURPOSE: To smoothly discharge chips by constituting a precision working tool in such a way that a cutter plate is turned in relation to the face passing the cutter edge of this cutter plate and the center axis in the longitudinal direction of the precision working tool. CONSTITUTION: A cutter plate 2 is turned in relation to the face A passing the cutter edge 11 of this cutter plate 2 and the center axis 17 in the longitudinal direction of a precision working tool 1. The cutter plate 2 is arranged in a groove formed in the body of the precision working tool 1 such that only the cutter edge 11 at an operation is brought into contact with the face A, and the upper face 16 in the side opposite to the cutter plate 2 of a tightening and holding member 3 is in the face A and forms the boarder face of a chip space 4. Therefore, the tightening and holding member 3 does not obstruct the passing of chips into the chip space, allowing the working tool to accurately and precisely machine the surface and shape of a bore. |
